<?xml version="1.0" encoding="utf-8"?>
<scale xmlns:android="http://schemas.android.com/apk/res/android"android:fromXScale="0.3"android:toXScale="1.2"android:fromYScale="0.3"android:toYScale="1.2"android:pivotX="50%"android:pivotY="50%"android:duration="3000"android:fillAfter="true"></scale>

然后在相应activity下编辑如下代码：

        Animation anim = AnimationUtils.loadAnimation(this, R.anim.scale_animation);openWeb.startAnimation(anim);

2. 动态实现：

        ScaleAnimation sa = new ScaleAnimation(0.3f, 1.2f, 0.3f, 1.2f, Animation.RELATIVE_TO_SELF, 0.5f,Animation.RELATIVE_TO_SELF,(float) 0.5);sa.setDuration(3000);sa.setFillAfter(true);openWeb.startAnimation(sa);

三、应用的欢迎动画界面实现

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"><alphaandroid:fromAlpha="0.4"android:toAlpha="1.0"android:duration="300"/><scaleandroid:fromXScale="1.0"android:toXScale="1.2"android:fromYScale="1.0"android:toYScale="1.2"android:pivotX="50%"android:pivotY="50%"android:duration="3000"></scale></set>

新建结束动画集anim_out.xml

<set xmlns:android="http://schemas.android.com/apk/res/android"><alphaandroid:fromAlpha="1"android:toAlpha="0.4"android:duration="2000"></alpha></set>

动画界面布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/welcom"android:orientation="vertical" android:layout_width="match_parent"android:layout_height="match_parent"android:fitsSystemWindows="true"android:background="@drawable/welcom"android:clipToPadding="true"></LinearLayout>

public class WelcomActivity extends AppCompatActivity {private LinearLayout welcom;Animation anim1=null;Animation anim2=null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);requestWindowFeature(Window.FEATURE_NO_TITLE);setContentView(R.layout.activity_welcom);getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);welcom=(LinearLayout) findViewById(R.id.welcom);anim1 = AnimationUtils.loadAnimation(this,R.anim.anim_in);anim2 = AnimationUtils.loadAnimation(getApplicationContext(),R.anim.anim_out);welcom.startAnimation(anim1);anim1.setFillEnabled(true);  //启动保持anim1.setFillAfter(true);//最后一帧保持，否则会跳动到原始anim1.setAnimationListener(new AnimationImpl() {@Overridepublic void onAnimationEnd(Animation animation) {welcom.startAnimation(anim2);anim2.setFillAfter(true);}});anim2.setAnimationListener(new AnimationImpl() {@Overridepublic void onAnimationEnd(Animation animation) {skip();}});}private void skip() {startActivity(new Intent(this,LoginActivity.class));finish();}
}